LHS Rocks and the Rock Cycle

¿Qué debe pasar con los sedimentos para que se conviertan en roca?

• meteorización, erosión y deposición

• compactación y cementación

• fusión, enfriamiento y solidificación

• calor y presión

Cuando las rocas sufren erosión, intemperie, compactación y cementación, se convierte en:

• magma

• roca ignea

• roca sedimentaria

• conos volcanicos

Ricardo has an igneous rock in his rock collection. Where did this rock most likely form?

• in a volcano
• on a forest floor
•  on a coral reef
• at the bottom of a river

Obsidian and pumice are extrusive igneous rocks and lack crystals. Why is it that these rocks do not have crystals?

• There are no minerals in magma.
• The lava cooled slowly, deep inside the Earth.
• The lava cooled too quickly above the Earth to allow for the formation of crystals.
• The pressure was too great to make any crystals.

Metamorphic rock forms when

• magma cools and hardens.
• minerals crystallize out of sea water.
• heat and pressure change the composition and texture of a rock.
• natural cement binds rock fragments together.

When tremendous heat and pressure is applied to sandstone deep within the Earth's crust, marble forms. It is a _____ rock

• chemical sedimentary
• extrusive igneous
• nonfoliated igneous
• nonfoliated metamorphic

Extreme Heat and Pressure creates a _________ rock.

• Igneous
• Metamorphic
• Sedimentary
• Mineral

True or False: Once a rock is sedimentary, it cannot become an igneous rock.

• True
• False

This rock started as lava that cooled and then was heated and put under pressure over time. What type of rock is this?

• Sedimentar
• Igneous
• Metamorphic

This rock was molten magma that slowly cooled under the ground. What type of rock is this?

• Sedimentary
• Igneous
• Metamorphic